Brush making machine



Feb. 6, 1945. 1.; E. JONES BRUSH MAKING MACHINE Filed Aug. 11, 1942 5 Sheets-Sheet l Feb. 6, 1945. JONES 2,368,661

BRUSH MAKING MACHINE Filed Aug. 11, 1942. s Sheets-Sheet '2 Feb. 6, 1945.

1.. E. JONES BRUSH MAKING MACHINE Filed Aug. 11, 1942 5 Sheets-Sheet 3 xaa Feb. 6, 1945. JONES 2,368,661

BRUSH MAKING MACHINE Filed Aug. 11, 1942 5 Sheets-Sheet 4 Feb. 6, 1945.

L. E. JONES BRUSH MAKING MACHINE Filed Aug. 11, 1942 5 Sheets-Sheet 5 Patented Feb. 6, 1945 UNITED STATES PATENT OFFICE.

2,368,661 BRUSH MAKING MACHINE Lloyd E. J ones, Pasadena, Calif. Application August 11, 1942, Serial No. 454,423

11 Claims.

This invention relates to a brush making machine of that type in which two brush backs are simultaneously and identically moved respectively beneath a drill and a bristle inserter whereby the hole pattern 'is drilled in one block while the other, previously identically drilled, is simultaneously furnished with bristle tufts.

One of the objects of the invention is to provide a brush-making machine of the type described, in which the brush backs can be respectively drilled and filled complete from one end to the other without removing the brush blocks from the brush tables and reversing their position.

Another object of the invention is to provide a brush-making machine including a reciprocable cradle for moving the brush blocks longitudinally, tiltable about a fixed axis in difl'erentphases of its longitudinal movement to present the brush blocks at the desired longitudinal angles to the axes of the drill and bristle inserter, interconnected brush tables carried by said cradle. transversely oscillatable about fixed axes to present the brush blocks respectively at the desired transverse angles to the drill and inserter, the axis of the cradle intersecting the axes of the brush tables in a common horizontal plane embracinglsaid axes, whereby in any position of the brush blocks, the pressure exerted by the drill or by the inserter occurs at a neutral point, that is to say, at the points of intersectionof said axes, eliminating any tendency for the brush blocks to shift during the drilling and filling operations.

A furtherobject of the invention is to provide a brush-making machine of the character described, in which the points on the working faces of the respective brush blocks being acted upon by the drill or inserting means, are always in the plane of the axes of the supporting means so' that the cam commonly employed for compensating diflerences in distance from the working face of the brush blocks to the datum positions Other objects of the invention are to provide in the drawings which a'ccompany and form a part of the following specification, and throughout the several figures of which the samecharacters of reference have been employed to designate identical parts: I

Figure 1 is a side elevation of a brush-making machine embodying the principles of the subject invention; I

Figure 2 is an end elevation of the same;

' Figure 3 is a vertical section through the cradle assembly;

Figure 4' is a cross-section taken along the line 4-4 of Figure 3;

Figure 5 isa cross-section taken along the line 55 of Figure 4; v

Figure 6 is a section'taken along the line 0-8 of Figure 2; a

Figures 7, 8, 9 and 10 are diagrammatic views showing successive positions of the cam' track and cradle assembly in the making of a brush of the type shown in Figure 11;

Figure 11 is a side elevation of a brush, which the bristle tufts converge at the center, flare at the ends, and are parallel in between;

Figure 12 is a side sectional view through a modified form of brush-making machine adapted to make the brush diagrammatically shown in Figure 14; 1 v

Figure 13 is an end view of the machine shown in Figure 12, part being broken away;

Figure 14 is a side elevation of a-brush, in which the angular relation of the bristle tufts continually change from end to end of the brush;

Figure 15 is a side elevation, somewhat diagrammatic, of a modified form of cam track adapted to make the brush shown in Figure 16; Figure 16 is a side elevation of a brush in which the bristle tufts converge at the center, flare at the ends, and continually change their angular relationship between the center and ends;

Referring now in detail to. the several figures.

and first adverting to that form of the invention-illustrated in- Figures 1 to 10, inclusive, the

brush-making machine is constituted by a sup porting frame I, comprising spaced side member 2 and 3, including the vertical standards 4 and 5 and the intermediate cross frame members 6 and I. -A shaft 8 is Journal'ed in the upper ends of the standards 4 and I, carrying a pulley 8, which forms the main drive for the machine,v deriving its power preferably from an electric motor,- DOtWBhOWIL' The shaft I carries the cams ill and II, which operate respectively the drill l2 and the bristle-inserter IS, the lat whfle the drill l2 rotates, as well asreciprocates.

Rotary movement is imparted to the drill by a.

pulley ii on the drill chuck l6, which pulley'is driven by an electric motor, not shown. The

drill is fed downward into the brush back by the cam I0, and when the hole has been drilled to the limit of its depth, the drill is withdrawn through the pull of the spring I1.

Said brush blocks are carried by brush'tables 41 is uppermost forms a continuous roller path 1 20 and 2|, which in turn are mounted in a cradle 22. The cradle 22, as shown, has the shape of a rectangular frame, the opposite side members of which have the outwardly extending supporting flanges 23 and 24. The sides of said flanges are provided with the longitudinal rack bars 25 and 26 having teeth on their lower edge which mesh with pinions 21 and 28 carried at the inner ends of stub shafts 29 and 30 'journaled in the respective standards .4 and 5 and extending outwardly beyond said standards. The outwardly extending ends of the said stub shafts are provided with gears 3| and 32 which mesh with vertically reciprocable rack bars 33 and 34.

The movement of the rack bars 33 and 34 imparts rotation to the pinions 21 and 28 andmoves the cradle 22 forward or backward in a longitudinal direction. I

In order to take the weight. of the cradl and the imposed load produced by the pressure of the with the adjacent fixed horizontal portion.

Referring now to the series of Figures 7 to 10,

the cradle 22 is shown in Figure 7 supported in.

an inclined position with the righthand portion resting upon the rollers 31 and 38 on the stub shafts 29 and 30, and the left end supported by the rollers 39', which rest upon the sloping cam track portions 4| near the lower ends of said portions. As the cradle 22 is moved to the right through the rotation of the pinions 21 and 28 against the rack bars and 26, the rollers 39 ride upward upon the sloping portions 4l of the cam track, progressively bringing the cradle to a horizontal position, which position is reached when the rollers 39 begin. to travel upon .the horizontal portions 43 of the cam track. In the position shown in Figure 1, the right hand endof a brush block carried by said cradle is so angularly related to the axis of,the drill as to produce the terminal flare a indicated in Figure 11. The

' cradle 22 continues in horizontal position so long drill and bristle inserter off of the intermeshing rack bars and pinions 25, 21, 26' and 28, the

as the rollers 39 travel upon the horizontal por-,1. tions 43 of the cam track. At .this time the opposite rollers 40 rest without weight upon the right hand side of the shifter, since the predominant weight of the cradle is to th left of the common axis of the stub shafts 2s and so. When the rollers 39 leave the horizontal portions 43 of the cam track and travel up the sloping portions or the shifter 41 the cradle 22 will be reversely tilted,

the rollers 40 simultaneously traveling down the sloping portions 48. This places the brush block in position for the drill to produce the flare shown tomatically released when the cradle 22 reaches is perpendicular to the axis of the drill and that this tilt must be progressively lessened up to the 1 point b, where the bristles are perpendicular to the plane of the brush block. Then the cradle must move along in a plane perpendicular to the axis of the drill up to thepoint 0. Then the brush block must tilt progressively in the opposite direction up to the pointd in the center of the brush, and at that point it must suddenly tilt in the opposite'direction, and this tilt must progressively diminish up to the point e where the bristles again become perpendicular to'the plane of the brush block. The cradle must then travel'in a plane perpendicular to the axis of the drill up to the point 2 where the bristles begin again to flare toward the opposite end of'the brush and from this point the cradle must progressivelyincrease the tilt up to the point a representing the flar at'the opposite end of the brush.

The cradle 22 is guided in the execution of these tilting movementsby means ofrollers 39 and 40 journaled at opposite-ends of the cradle and which ride upon a suitably shaped cam track having flxed and reversing oscillatable portions.

This cam track is best shown in the views com-' Dreh'ended in Figures '1 to 10, inclusive, and includes, for the type of brush shown in Figure 11,

the identical fixed upwardly sloping end portions 4| and 42, the intermediate identical flxed horizontal portions 43 and 44 and the identical sloping portions 45' and 46 formed ona reversely oscillating shifter 41 pivoted in vertical alignment v its neutral positionv upon the shifter shown in Figure 8. This permits the shifter immediately to tilt in the opposite direction to the position shown in Figure 9, the cradle 22 now being so anthe reverse position shown in Figure 9. -The' righthand end of the cradle-22 then descends the sloping portions 46 of the shifter, progressively reducing the tilt of the cradle until the rollers 46 rest upon the fixed horizontal portions 44 of the the tilt increasing as cam track. By this time the predominant weight of the cradle is to, the right of the common axis'of the stub shafts 29 and 38 so that the left end of the cradle rests without weight upon the'opposlte side of the shifter. The cradle maintains a hori-' zontal position while the rollers 40 travel over the flxed horizontal portions ."44 of the cam track, during which time the axis of .the drill is pernem,

dicular to the brush block for drilling the holes in that portion of the brush between the reference characters e and f in Figure 11. -When the rollers 40 move of! of the horizontal portions 44, of the cam track onto the sloping portions42, the

cradle 22 begins to tilt at the opposite direction, 1

the rollers 44 descend the slope for producing the flare. at the terminal portion of the brush designated by the reference character g in Figure 11.

Now, referring to the means for latching and releasingthe shifter, this is best shown in Figure 1, in which a manually oscillatable lever 48 is pivoted at an intermediate point in its length to the shaft 49, which extends between the side members 2 and3 of the frame and carries on its opposite side an arm 58 extending diametrically on both sides of the shaft 48 and in the same transverse plane as said lever. The lever 48- has a handle at one end, by means of which it Q I may be oscillated with respect to a detent quadrant 52,- and having a detent 53 interengaging of said shifters, one pair being anchored to the lever 48 and the other to the arm 58 at opposite sides of the axis of rotation of said rod and lever. Thus, when the lever-48 is in the full line position shown in Figure 1, the springs 55 on the left-hand side are stretched, while the springs 58 on the right-hand sideare released. When the lever 48 is moved-to a position in which the springs 55.

position, in which the detent 53 is in the notch 54, releasing the springs 85 and stretching the In the reverse movement of the cradle 22, as sOOn as it reaches the position with the rollers 48 riding upon the slopes 45 of the shifters 41, the right-hand-trip members 83will engage the inwardly projecting pins on the pawls 58; releasing them from the stops 58 and causing the then stretched springs 55 to snap the shifters to their opposite position in which they are automatically latched.

Referring now particularly to Figures 2, 3 and .4 the brush tables 28 and 2| are mounted in detent 53 is in the notch 54, conditions are reversed. The springs 55 are then relaxed and the springs 58 stretched. The shifter 41 is provided adjacent its opposite ends with the stops ported by the cross frame member I. The cradle 22 carries-adjacent opposite ends of its outwardly extending flanges 23 and 24, the pivoted trip members 63 which have free unidirectional movespaced'relation within the cradle 22, supported upon rollers=13 and 14 carried by the inwardly protectin gpins "Hand 15 which are made fast to the end walls "and 18 of the cradle 22. It

is to be noted that the axes 84 and 85, of the.

two sets of pins 15 and 18 lie in the same plane as the common axis of the stub shafts 28 and 38, about which the cradle 22 tilts, and perpendicular to said common axis. Each of the brush tables comprises a brush block support 68 extending between the end members 81 and 88. Said end members have the outwardly extending flanges 58 and 18, the under faces of which are shod with the, wear pieces 1| and 12 rest.- ing upon the respective rollers 13 and 14. The brush block support 55 is parallel to the axis 54 of the roller pins and sufliciently depressed below the axis 64 so that when .the brush block I8 is clamped to said support, the clamp means not being shown, the face of said brush block shall be in a common plane with said axis.

The end members 51 and 88 of said brush tables are interconnected both above and below the ment being stopped'from movement in the re- I shifter 41 elevated at its left'end and latched in this position, the notch in the pawl 58 engaging the stop 51. Before the cradle 22 moves toward the right, the operator of the machine sets the lever 48 in the full line position shown, stretch-- ing the springs 55 and releasing the springs 55. When the cradle 22 has moved forward to the point at which the rollers 38 ascend the sloping brush block support by the pivotal links 18 and 80, so that said brush tables oscillate in unison. The lower links 88 are connected by links 85 to fixed lugs 81 on the cradle, permitting the lower ends of the brush blocktables tances between said axi centers and the ends of said flanges. Thus the points ofpivotal conportions 45 of the shifters 41, the trip members 53 engage the pins I34 projecting inwardly from the pawls 58, pushing them away from the stops 51, permitting the stretched springs 55 to snap the shifters 41 into their opposite position against the lesser tension of the springs 58. In the meantime, the trip members 53 at the opposite end of the cradle 22 have tilted through contact with corresponding inwardly projecting pins, the opposite pawls 58, freely overriding said pins so as to be on the right-hand side thereof. When the left end of the shifters 41 were snapped down by the springs 58 upon release of the nection between the links 88 and the lower'ends of the brush block tables become floating axes about which the tables tilt transversely. One of said brush block tables, for instance, the brush block table 21, ha lug 81 secured at either end thereof, preferably connected by a wear piece 82 which is in the path of transverse recipro-' cation of an arm 83 moved-by means which will presently be described. The arm 83 oscillates the brush tables counterclockwisely, as viewed in Figure 3, said brush block tables being oscillated in the opposite direction'by means of a spring 84 stretched between one lug 8| and an anchoring pin 85 fixed to the cradle 22. It will At any time after the latching of the pawls l and before the cradle moves back in theopposite direction; the operator shifts the lever- 48 from the full line osition shown to the reverse be understood that since the brush block tables move linearly in contact with the rollers 13 and 14, throughout their range of oscillation, the p int on the brush block intersected by the axis of the drill is always in the common plane which embraces the common axis of the stub shafts 25 and 38 and the axes 54 and 55 of the brush block tables. Consequently, no co'mpqsating cam is needed for moving the brush blocks closeror farther from the drill or the bristle inserti mechanism.

I For varying thesidewise flare of the bristles, the end members 81 and 88 and the lugs 81 extend downward in parallel relation, each being for each step of movement of the ratchet provided with a series of holes I33 in any of wheel 80.

which the pivots of the links .80 and 86 may be Another cam I ls'flxed to the shaft 88, movselectively engaged, the lower the link connecingstep by step in synchronlsm with the ratchet tions the greater the radius of swing and the 5. wheel 80. This-cam has ast pp Spiral smaller will be the angularity of the side flare face comprising a series of circular arcs I01 of the bristle tufts. about the axis of the shaft 88 as a radius. The Before adverting to the mechanisms which high and low pointsof the spiral are connected produce the longitudinal reciprocatory move-, by a surface II2 which drops abruptly toward ments of the cradle 22 and the oscillatory movethe middle of thecam, forming a shoulder. The

I ments of the brush block tables carried by saidcam I00 operates directly upon the rack bar 33 table, it may be stated that the brush is comthrough the intermediary of a roller I08 jourpleted during the travel of the cradle in one naled in the bifurcated foot of said rack bar. A

power shaft 8, which transmits motion through .shaft 8 in which the drill and the inserter are direction, to the right as shown in the drawings; lay shaft I08 is journaled between the standthat this movement is executed step bystep, ards 5 and 4 carrying at oneend a pinion IIO one step for each transverse row of bristle tufts, directly engaged by the rack bar 34, and having and that between each step of longitudinal at its opposite end a pinion III which meshes movement of the cradle 22 the brush block tawith the rack bar 33 and causes both the rack blesperform a plurality of step by step transbars 33 and 34 to move simultaneously and in verse movements equal to the number of bristle the same phase. It has already been pointed tufts in a transverse row. 3 out that the rack bars 33 and 34 actuate the pin- These step by step movements are produced ions'3I and 32 which operate the gears 21' and and controlled by a seriesof' cams on a shaft 28 that move the cradle 22 in alongitudinal 88 which extends between the side frame memdirection. bers 2 and 3, being journalled in said members, and extending therebeyond on one side, as clear- 1y shown in Figure 2. On this shaft is a ratchet wheel 80 having peripheral teeth 8I equal in number to the number of holes in the brush so block pattern. Motion is imparted to said ratchet wheel and to the shaft 88 to which it is amxed by means of a crank 82 on the main 34 and 33 immovable while the rack bar 88 is traveling step by step from a peak of the cam 86 to a valley of the same'cam. In other words, the cradle 22 stays in one longitudinal position while the brush block tables oscillate step by step in one direction to produce a transverse row of holes in one brush block and simultaneously to insert a corresponding transverse row of bristle tufts in the other brush block. At the a pltman 83 to a bellcrank lever ,84 joumaled in a the side frame member 3, and which carries a pawl 85 operating upon the teeth SI of the ratchet wheel In that phase position f the block tables, the cam I06 has moved so that the roller I08 of the rack bar 33 drops to the level of the next adjacent arc. This produces a reciprocation of therack bars 33 and 34 which moves the cradle 22 one step longitudinally to the right; Then the brush block tables oscilwithdrawn from the brush block, the pawl 85 o advances against the tooth 8I which it contacts, and moves the ratchet wheel one step;

t at 18 to m terms of the brush bmck' it latestep by step in the opposite direction to in v 0 es Sam brush block through dlstaince equal produce. another transverse row of holes and v spacmg between hues tufts respectively in the two brush blocks, after A cam 96 is fixed to the Shaft 89 having which the cradle 22 makes another stepv to the The arcs I01 on the surface of the cam I06 are of suflicient linear extent to hold the rack bars end of the transverse oscillation of the brushundulatmg surface provldmg senes of peaks right,,and,so on until the entire brush block 81 alternating with a series'of valleys 88. This i I r pattern has been completed. This occurs when cam moves with the ratchet wheel 80. The cam the cradle 22 has moved to thee-right through 35 imparts step by step reclprocatory movement the. fun extent of its range of traveL tg g gggggfg egg g jfi fgg g gggig At this time the roller ma falls from the shoulwithin the bifurcated lower end of said rack z i bar and the distance on the surface of said cam descend qu-lc movmg e cm e m a e betveen the p of a peak and the bottom of the ward direction through its entire range of travel adjacent valley re resents a luralit of ste in its starting'positmn' the shifter being re- D P PS versed before the cradle passes its middle posithe movement of said cam equal to the number mm on its return gz gz rfiz gr: g g g j fi g' ear o on a The brush-making machine as above described stub shaft I02 the latter being i urnaled in a may beadlusted to make-the type of brush Show i in Figure 16 by substituting a cam track such as housing fixed ,stgndard stub that shown in Figure 15,v which is characterized shaft 102 carries a pmmn, which-1111951185 by the absenceof horizontal portionscorrespond- V with the teeth of a transversenlovable rack bar m to the portions 43 and I shown in Figure 7.

105, (see Figures .2 and 6). Said transverse In thisjorm of cm track the i 5 is 80 rack. bar i -5 the arm 33 Previously referred designed that the movable sloping portions II3 to, which bears against the lug ll c d y the and H4, or the shifter align with the fixed slopinterconnected brush block tables 20 and 2|. ingportions H8 and I I1 and have the same angle For ea h st of movement of the ratchet. or slope when so aligned. The iengthof the wheel. 80 a d sha thcarm (3 m es a step lloping portions in and m must be sumcient to in a ri htward dlrcctwn, a view i g r enable. the rollers 38 or 40, as the case may be, to

.while the roller I00 is descending from a peak ride high enoughto tilt the cradle 22 in a reverse to a valley on'the cam88, andwhile the roller direction at a small angle bringing the sloping is ascending from said valley to the adjacent portions of the shifter into alignment with the peak, the arm 83 moves step by step .to the left corresponding sloping portions of the fixed cam.

track, to provide the continuously changing angular pattern between the'points h and i of the brush in Figure 16, with reverse flares at said"- points.

The shifter then reverses, the cradle continuing toward the right, the roller 4|! riding down the common slope of the contiguous movable and fixed portions Ill and III of the cam track, providing the bristle tuft pattern from i toy in Figure 16.

Now, adverting to that form of the invention shown in Figures 12 and 13, this shows a cam track adapted to make a brush of the type shown in Figure 14, in which the angularity of the bristle 29 and 30, the axis 29 only, being shown. The

end portions of the cam track are represented by the guide members ,I I8 and H9 pivoted to the cross frame at the points I and I2I, and adiustably fixed at any angle by the clamp means I22, Figure 13, secured to said guide members. and w ch may be clamped at any point along the fi ed quadrants I23 and I24. The guide members I I8 and I III are provided with the track flanges I25 and I 26 projecting inwardly, and the overhanging keeper flanges I21 and I28, which, form between them channels I29 and I30 for the rollers I3I and I32 carried. by'the cradle 22 adjacent its opposite ends. The cradle moves from left to right, being first at its maximum angle of slope. which angle diminishes until the cradle is in a mid-position between the guide members. in which position it is horizontal and then it reverses its angularity, progressively increasing its slope until it reaches its limit of travel in a rightward direction. Inasmuch as there is no sudden change in angularity of the bristle tufts in the middle of the brush, no reversible shifter is required. It is understood that Figures 12- and 13 only illustrate enough of the machine to disclose the type of cam track employed, and that other details of structure are the same as in that form of the invention illustrated in Figure 1, excepting as regards those elements which are concerned with the operation and control of theshifter and which are obviously omitted.

While I have in the above description disclosed what I believe to be a preferred and practical tersecting said first mentioned supporting axis at a point which shifts longitudinally of said brush block table supporting axis but necessarily re- 1 mains in the axis of the drill, said brush block table being constructed to support a brush block with an element of its face to be drilled coincident with the supporting axis of said brush block table, means for oscillating said brush block table step by step to bring different points in each linear zone of the brush block into the axis of the drill, and means to shift the brush block table relative to. its supporting axis in a plane perpendicular thereto to bring each drilling point embodiment of the invention. it will be understood to those skilled in the art that the details of construction and the arrangement of parts as shown and described are by way of example, and not to be construed as limiting the scope of the invention as defined in the appended claims.

What I claim is: 1

1. In a machine for making brushes withflared bristle tufts, a reciprocable drill .for making bristle tuft holes in the face of a brush block, said drill having a fixed axis, means forming a fixed axis perpendicular to the axis of said drill and intersecting the axis of said drill, a tiltable cradle supported by said axis forming means, means for moving said cradle step by step across said axis forming means to brin different linear zones of said brush block into registry with the axis of the dril1,'a brush block table supported in on the face of said brush block to the point of intersection of the cradle supporting axis and the axis of the drill.

2. In a machine for making brushes with flared bristle tufts. a reciprocable drill for making bristle tuft holes.in the face of a brush block, said drill having a fixed axis, means forming a fixed axis perpendicular to the axis of said drill and intersecting the axis of said drill, a cradle supported by said axis forming means, means for moving said cradle step by step across-said axis forming means to bring difierent linear zones of said brush block into registry with the axis of said drill, a cam track engaged by said cradle. shaped to impart desired tilting movements to said cradle while moving across said axis forming means, a brush block table supported in said cradle on an axis fixed with respect to said cradle. perpendicular to the supporting axis of said cradle, passing through the axis of said drill, and

drilled coincident with the supporting axis of said brush block table, means for oscillating said brush block table step by step to bring different points in each linear zonepf the brush block into the axis of the drill, and means to shift the brush block table relative to its supporting axis in a plane perpendicular thereto to bring each drilling point on the face of the brush block to the point of intersection of the cradle supporting axis and the axis of the drill.

3. In a machine for making brushes with flared bristle tufts, reciprocable tools movable along fixed spaced parallel axes, the one for drilling a hole pattern in a brush block, the other for simultaneously filling .a similarly drilled brush block. means. forming a fixed-axis perpendicular to the axes of said tools and intersecting the axes of said tools, a tiltable cradle supported by said axis forming means, means for moving said cradle step by step across said axis forming means to bring different linear zones of said respective brush blocks into registry with the axes of said tools, brush block tables supported in said'cradle cradle, passing through the axis of said drill, in-

on spaced parallel axes fixed with respect to'said cradle, perpendicular to the supporting axis of said cradle, respectively passing through the axes of said tools, and intersecting said cradle supporting axis at points which shift longitudinally of said brush block tables but necessarily remain in the axes of said tools, said brush block tables being constructed and arranged to support the respective b ush blocks with an element of the face of each to be drilled or filled, COincident with the supporting axes of the respective brush block -tables, means for oscillating said brush block 76- tables in unison, step by step to bring different points in each linear zone of the respective brush the: respective brush blocks to the respectivepoints'of intersection of the cradle supportingaxes andthe axes of said tools.

4. In a machine for making brushes with flared bristle tufts, a reciprocable drill for making bristle tuft holes in the face of a brush block, a cradle for carrying a brush block, means rotatable about aflxed axis perpendicular to the axis of said drill and intersecting the axis 'of said drill, engaging cooperating means on said cradle for moving the latter across the axis of said rotatable means, cam

controlled means for operating said cradle moving means to impart step by step movement to said cradle across the axis of said rotatable means to bring different linear zones of said brush block into registry with the axis of said drill, a cam track engaged by said cradle shaped to impart desired tilting movements to said cradle while the latter'is moving across said axis, a brush block table supported in said cradle on an axis fixed with respect tossaid cradle, perpendicular to the supporting axis of said cradle, passing through theaxis of said drill, and intersecting said cradle supporting axis at a point which shifts longitudinally of said brush block table supporting axis but brush block table being constructed and arranged to support a brush block;with an element of its block with an element of its face to be drilled coincident'with the supporting axis of said brush block table, means for oscillating said brush block table step by step to bring different points in each linear zone of the brush block into the axis of the drill, a (1 means to shift the brush block table relative its supporting axis in a plane perpendicular thereto, to bring each drilling point on the face of the brush block to the point of intersec- I necessarily remains in the axis of the drill, said face to be drilled coincident with the supporting axis of said brush block table, means for oscillating said brush block table step by step to bring diflerent points in each linear zone of the brush block into the axis of the drill, and means to shift the brush block table relative to its supporting axis in a plane perpendicular thereto to bring each drilling point'on the face of the brush block to the point of intersection of the cradle supportingaxisand the axis of the drill.

5. In a machine for making brushes with flared bristle tufts, a reciprocable drill for making bristle tuft holes in the face of a brush block, a cradle for carrying a brush block, means rotatabl about a flxed axis perpendicular to the axis of said drill and intersecting'the axis of said drill, engaging cooperating means on said cradle for moving the latter across the axis or said rotatable means, cam controlled means for operating said cradle moving means to impart step by step movement to said cradle across the axis of said rotatable means to bring different linear zones of said brush block into registry with the axis of said drill, a cam track engaged by said cradle having sloping extreme, portions for giving opposite tilt to the cradle and brush block to produce the opposite flares of the holes in the opposite end portions of the brush block, said cam track having a middle portion pivotally'shiftable about the axis of said rotatable means to reversely inclined positions for providing abrupt reversal in th flare of the holes 'at an intermediate region of the brush block,

means for reversing the middle portion of said cam track, a brush block table supported in said cradle on an axis flxed with respect to said cradle,

tion of the cradle supporting axis and the axis ofthe drill.

6. In a machine for making brushes with flared axis of said drill and intersecting the axis of said drill, engaging cooperating means on said cradle for moving the latter across the axis of said rotatable means, cam controlled means for operating said cradle moving means to impart step by step movement to said cradle across the axis of said rotatable means to bring diflerent linear zones of said brush block into registry with the axis of said drill, a cam track engaged by said cradle having sloping extreme portions for giving opposite tilt-to the cradle and brush block to produce the opposite flares of the holes in the opposite end portions of thebrush block, said cam track having a middle portion pivotally shiftable about the axis of said rotatable means to reversely inclined positions for providing abrupt reversal in the flare of theholes at an interme- "diate region of the brush block, means for reversing the middle portion of said cam track, latch means for-holding the middle portion of said cam track ineither of its;inclined positions against the bias of said reversing means, said latch means being tripped by said cradle at the 40 determined point for reversing the inclination of said cradle, a brush block table supported in said cradle on an axis fixed with respect to said cradle, perpendicular tothe supporting axis of said cradle, passing through the axis of said drill,

and intersecting said cradle supporting axis at a pointwhi'ch shifts longitudinally of said brush block table axis but necessarily remains in the axis of the drill, said brush block table being constructed and arranged to support a brush block with an element of its face to be drilled coincident with the axis of said 'brush block table, means for oscillating said brush block table step by step to bring different points in each linear zone of the brush block into the axis of the drill,

and means to shift the brush block table relative to its supporting axis in a plane perpendicular thereto to bring each drilling point on the face of the brush block to the point of intersection of tuft holesin the face of a brush block, a cradle perpendicular to the supporting axis of said cradle, passing through the axis of said drill, and

, intersecting said cradle supporting axis at a point which shifts longitudinally ofsa-id brush block table supporting axis but necessarily remains in the axis of the drill, said brush block table bein constructed and arranged to supp rt a brush for carrying a brush block, means rotatable about a fixed axis perpendicular to the axis of said drill and intersecting the axis of said drill, engaging cooperating means on said cradle for moving the to bring different linear zones-of said brush block block, said cam track having a middle portion pivotally shiftable about the axis of said rotatable means to reversely inclined positions for providing abrupt reversal in the flare of the holes at an intermediate region of the brush block, means for reversing the middle portion of said cam track, spaced rollers mounted in said cradle on a common axis fixed with respect to said cradle, perpendicular to the supporting axis of said cradle, passing through the axis of said drill and intersecting said supporting axis at a point which shifts longitudinally of said roller axis between said rollers, but necessarily remains in the axis of the drill, a brush block table tiltably supported by said rollers to move across said roller axis, said brush block table being constructed and arranged to support a brush block with an element of its face to be drilled coincident with said roller axis, means for moving said brush block table step by step across said roller axis, to bring different points in each linear zone of the brush block into the axis of the drill, and means to shift the brush block table relative. to

its roller supporting axis in a plane perpendicular thereto to bring each drilling point on the face of the brush block to the point of intersection of the cradle supporting axis and the axis of the drill.

8. In a machine for making brushes with 'fiared bristle tufts, a reciprocable drill for mak-' ing bristle tuft holes in the face of a brush block, a cradle for carrying a brush block, means rotatable about a fixed axis perpendicular to the axis of said drill and intersecting the axis of said drill engaging cooperating means on said cradle for moving the latter across the axis of said rotatable means, a cam operatively connected with said cradle moving means to impart step by step movement to said cradle to bring different linear zones of said brush block into registry with the axis of said drill, a cam track engaged by said cradle having sloping extreme portions for giving opposite flares to the holes in the opposite end portions of 'the brush block, said cam track having a middle portion pivotally shiftable about the axis of said rotatable nieans to reversely inclined positions for providing abrupt reversal in the flare of the holes at an intermediate region of the brush block, means for reversing the middle portion of said cam track;

spaced rollers mounted in said cradle on a common axis fixed with respect to said cradle, perpendicular t'o the supporting axis of said cradle, passing through the axis of said drill and intersecting said supporting axis at a point which shifts longitudinally of said roller axis between said rollers, but necessarily remains in ,the axis of the drill, a tiltable brush block table sup-v movement of said brush block table occurs at the intervals between the steps of movement of said-cradle, and means to shift said brush block table relative to said roller axis, in a plane perpendicular thereto, to bring each drilling point on the face of the brush block to the point of intersection of the cradle supporting axis and the axis of the drill.

, 9. In a machine for making brushes with flared bristle tufts, a reciprocable drill for making bristle tuft holes in the face of a brush block, a cradle for carrying a brush block, means rotatable about a fixed axis perpendicular to the axis of said drill and intersecting the axis of said drill, engaging cooperating means on said cradle for moving the latter across and oscillatably about the axis of said rotatable means, cam tracks at opposite sides of said cradle moving means pivotally mounted at their inner ends and arcuately adjustable to vary the angularity of 'the endwise flare of the bristle tufts, cam track engaging means on said cradle adjacent opposite ends thereof, alternately engageable with the adjacent cam tracks, to be guided thereby as the middle of the cradle passes the axis of said cradle moving means, and a brush block table carried by said cradle for supporting a brush block in operative relation to said drill.

10. In a brush making machine, a reciprocable drill having a fixed axis for making bristle tuft holes in a face of a brush block, means for supporting said brush block to permit rectilinear movement and tilting in a longitudinal direction having an axis intersecting the axis of said drill and being perpendicular thereto, means for supporting said brush block to permit rectilinear movement and tilting in a transverse direction having an axis intersecting the axis of said drill and the axis of said first mentioned supporting means, the axes of both said supporting means lying in a common plane whereby the three said axes intersect at a common point, and means to bring predetermined points on the face of the brush block successively into coincidence with the common point of intersection of the three said axes.

11. In a brush making machine, a reciprocable drill having a fixed axis for making bristle tuft holes in a face of a brush block, means for supporting said brush block to permit rectilinear drill and being perpendicular thereto, means to advance the brush block longitudinally step by step, means for supporting said brush block to permit rectilinear movement and tilting in a transverse direction having an axis intersecting the axis of said drill and the axis of said first mentioned supporting means, the axes of both said supporting means lying in a common plane whereby the three said axes will intersect.at a common point, means to oscillate the brush block transversely step by step intermediate the steps of longitudinal movement, whereby predetermined points on the face of the brush block will be brought into successive coincidence with the common point of intersection of the three said axes.

. LLOYD E. JONES. 

